Coolant issues

[BarnyE]

Hi, I’ve been rebuilding my van for the last 12 months, it got delivered on a trailer and I’m almost ready for its first test.

But I’m having an issue with the cooling system. Apologies this is my first t25 and I definitely jumped in at the deep end!
Originally a 1.9 petrol, converted to 1.9 1Y diesel.
Work done by previous owner only described as dodgy at best. See below.

viewtopic.php?t=182077

So I’ve swapped all the hoses and everything is looking like it’s meant to look.
From this
To this

I’ve not taken it on the road yet. But had the engine up to temp by holding the revs at around 2k rpm with occasional busts of full throttle. Temp guage goes to where I expect it should.
And holds there nicely fan kicks in it goes back down again. However, I’m not getting any hot air through my blowers. And the unpressurised tank does not seem to be doing anything. The blue cap on the pressurised tank is new so “should” be working. But I seem to get no coolant being pushed into the unpressurised tank. Or sucked back.

I assume the two issues may be linked. System not getting pressurised properly because the heater matrix isn’t bled. But I’ve followed brickwerks’s instructions and just can’t seem to get it bled! Any suggestions?


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[BarnyE]

Pressurised tank is full to the brim.
Unpressured tank just sits there with new clean coolant not doing anything.


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[Rik]

Have you checked your heater valve is actually opening?

[BarnyE]

No, I haven’t. Is it easy to find out?


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[Rik]

Probably not very easy. At least you can try to see if the cable moves the lever as it should. It is somewhere above the spare wheel. Perhaps try to pull a hose off somewhere behind the valve, start the engine with it closed and slowly open it to see if fluid starts to flow?

[BarnyE]

All the levers move with the appropriate level of resistance.


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